Paeds · haematology-oncology-and-transfusion
Childhood cancer warning signs and diagnostic pathways
Also known as Childhood cancer · Paediatric malignancy · Signs of childhood cancer · Suspected cancer referral · Diagnostic delay in childhood cancer
Fellowship guide to the warning signs and diagnostic pathways of childhood cancer. Covers the rarity of childhood malignancy against a sea of benign presentations, the central principle that persistent or progressive symptoms are the red flags, the headline patterns of leukaemia, central nervous system tumours, abdominal masses, lymphadenopathy and leucocoria, the primary-care investigations and the urgent referral to a paediatric oncology centre, the diagnostic interval and the causes of delayed diagnosis, the oncologic emergencies that declare at presentation, the cancer predisposition syndromes that lower the threshold to investigate, and the global survival gap and survivorship.
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Red flags
- Persistent unexplained fever, pallor, bruising, fatigue or weight loss that does not resolve over the expected benign course is cancer until the workup proves otherwise
- A white pupillary reflex, leucocoria, in a child of any age is retinoblastoma until excluded, and needs an urgent red-reflex test and ophthalmology referral within days
- A headache that is progressive, worse on waking or with early-morning vomiting, or any new ataxia, regression or abnormal eye movement is a central nervous system tumour until imaged
- An abdominal mass in a child is a Wilms tumour or a neuroblastoma until proven otherwise, and is assessed urgently with ultrasound and urinary catecholamines
- Persistent painless lymphadenopathy, a mediastinal mass, or a mass anywhere that is hard, fixed, growing or larger than two centimetres for more than four weeks needs urgent referral
- Fever in a child with a neutrophil count under zero point five times ten to the nine per litre is febrile neutropenia; give an antipseudomonal beta-lactam within one hour
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- Names leukaemia, central nervous system tumours, lymphomas and the solid tumours as the major groups of childhood cancer and the approximate incidence order
- Recognises that persistent or progressive symptoms are the red flags and arranges urgent referral rather than reassurance
- Identifies leucocoria, an abdominal mass, a progressive headache with early-morning vomiting and unexplained pallor with bruising as red-flag presentations
- Explains why childhood cancer is rare but lethal if missed, and how the primary-care task is pattern recognition and triage rather than tissue diagnosis
- Coordinates the primary-care investigations, the safety-netting review and the urgent referral pathway to a paediatric oncology centre
- Distinguishes the oncologic emergencies at presentation, the cancer predisposition syndromes, and the survivorship late effects
- Persistent unexplained symptoms over four or more weeks, or any hard fixed growing mass or leucocoria, warrant urgent suspected-cancer referral
- An abdominal mass in a child is assessed with ultrasound, full blood count and urinary catecholamines, and referred urgently
- A child with cancer who becomes febrile and neutropenic receives an antipseudomonal beta-lactam within one hour of presentation
- Counsels a family on the meaning of persistent symptoms, the referral pathway, and the modern survival of childhood cancer
- Builds the multidisciplinary plan linking primary care, paediatric oncology, the diagnostic laboratory, the family and the survivorship clinic
- Synthesises the long-case child with a suspected cancer into a recognition, referral, staging and supportive-care plan
- Level 1: Recognition of the red-flag features of childhood cancer and the urgent referral pathway
- Level 2: Application of primary-care investigations and safety-netting to triage suspected cancer
- Level 3: Coordination of the diagnostic pathway, the oncologic emergencies, and the transition into treatment and survivorship
- The major groups of childhood cancer and their approximate incidence, with leukaemia the commonest
- The persistent and progressive symptom patterns and the specific red flags for each tumour group
- The diagnostic interval, the causes of delayed diagnosis, and the oncologic emergencies at presentation
- Structured assessment of a child with persistent symptoms, weight loss, pallor, a mass, lymphadenopathy or an abnormal eye finding
- Communication of the suspected-cancer referral and the pathway ahead to a child and family
- Recognition of the oncologic emergencies of febrile neutropenia, tumour lysis, hyperleukocytosis, mediastinal mass and spinal cord compression
- Childhood cancer as a rare but must-not-miss diagnosis and the basis for the anticipatory guidance and the red-flag recognition
- The diagnostic roles of the full blood count and film, the urinalysis for catecholamines, the ultrasound and the urgent imaging
- The cancer predisposition syndromes including Down syndrome, Li-Fraumeni, Beckwith-Wiedemann, retinoblastoma and neurofibromatosis type one
- Recognition of the red-flag clinical features that mandate urgent referral to paediatric oncology
- Application of the primary-care workup and safety-netting to triage persistent symptoms
- Coordination of the diagnostic and multidisciplinary pathway and the survivorship plan
- Canadian approach to the urgent evaluation and referral of a child with suspected cancer
- Primary-care investigations, safety-netting and the centralisation of cancer care in specialist centres
- The oncologic emergencies, the cancer predisposition syndromes and the survivorship late effects
Overview & Definition
A child is brought back to the clinic for the third time in a month, still pale, still tired, still not right, and the temptation is to reassure the family and send them home. Childhood cancer is rare, and the individual symptoms overlap with the everyday benign illnesses of childhood, which is exactly why it is missed. The paediatric task at the front line is not to make a tissue diagnosis, it is to recognise the pattern that does not resolve, to name it a red flag, and to move the child into the urgent referral pathway before the window for curable, early-stage disease closes. [1]
Childhood cancer is the collective term for the malignant diseases of the zero-to-fourteen-year age band, with adolescents often included up to nineteen. It is biologically distinct from adult cancer, driven more by developmental errors of differentiation than by environmental carcinogenesis, and it is dominated by the haematological malignancies, the central nervous system tumours and the embryonal solid tumours rather than the epithelial carcinomas of adults. The central clinical principle is that any symptom or sign that is persistent, progressive, unexplained, or out of proportion to the expected benign course carries a small but real probability of cancer, and that probability is what justifies the referral. [2]
The survival of childhood cancer is one of the great successes of modern paediatrics, with five-year survival now exceeding eighty percent in high-income settings, but this success is entirely conditional on early diagnosis and prompt transfer to a treating centre. Globally the picture is reversed, with the majority of the world's children presenting late and dying of treatable disease, and the diagnostic pathway, not the chemotherapy, is the rate-limiting step. A clinician who internalises the warning signs and the pathway closes the gap between a curable early cancer and a lethal late one. [3]
References10ShowHide
- [1]Fragkandrea I, Nixon JA, Panagopoulou P Signs and symptoms of childhood cancer: a guide for early recognition Am Fam Physician, 2013.PMID 23939697
- [2]Steliarova-Foucher E, Colombet M, Ries LAG International incidence of childhood cancer, 2001-10: a population-based registry study Lancet Oncol, 2017.PMID 28410997
- [3]Bhakta N, Force LM, Allemani C Childhood cancer burden: a review of global estimates Lancet Oncol, 2019.PMID 30614477
- [4]Fabian ID, Abdallah E, Abdullahi SU, et al. Global Retinoblastoma Presentation and Analysis by National Income Level JAMA Oncol, 2020.PMID 32105305
- [5]Vasquez L, Oscanoa M, Tello M Factors associated with the latency to diagnosis of childhood cancer in Peru Pediatr Blood Cancer, 2016.PMID 27394036
- [6]Verma N, Bhattacharya S Time to Diagnosis and Treatment of Childhood Cancer Indian J Pediatr, 2020.PMID 32056193
- [7]Erdmann F, Frederiksen LE, Bonaventure A Childhood cancer: Survival, treatment modalities, late effects and improvements over time Cancer Epidemiol, 2021.PMID 32461035
- [8]Maris JM Recent advances in neuroblastoma N Engl J Med, 2010.PMID 20558371
- [9]Prusakowski MK, Cannone D Pediatric Oncologic Emergencies Hematol Oncol Clin North Am, 2017.PMID 29078932
- [10]Frebourg T, Bajalica Lagercrantz S, Oliveira C Guidelines for the Li-Fraumeni and heritable TP53-related cancer syndromes Eur J Hum Genet, 2020.PMID 32457520